import greenfoot.*;

/**
 * This class defines a crab. Crabs live on the beach.
 */
public class Crab extends Actor
{
    public void act()
    {
        move(3);
        turnAtEdge();
        keyControl();
    }
    public void turnAtEdge(){
        if(isAtEdge()){
            turn(15);
        }
    }
    public void keyControl(){
        if(Greenfoot.isKeyDown("left")){
            turn(-10);
        }
        if(Greenfoot.isKeyDown("right")){
            turn(+10);
        }
    }
}